Re: Current XFMR
Subject: Re: Current XFMR
Date: Sat, 30 Mar 1996 23:35:06 -0500 (EST)
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> The CT s that you are looking for are the modified Rogowski type and are
> never seen at common hamfests, I have looked for years.
> The type you might have been refering to are the power 60hz types. These
> will not measure primary tank current, but will measure your power
> transfomer currents to a limited degree.
I had thought that the CT reference in the original post was to be used
to measure the 60Hz line current. Is there anything that would take the
non-sinusoidal nature of the line current into account?
Also, while you're on the subject, is a modified Rogowski type CT
anything more than a CT wound on a piece of plastic tubing (i.e. - an air
core) instead of using an iron core? I'm assuming that the response at a
given frequency for a wide range of currents would be linear since the air
would not saturate. I could then calibrate it at a low current source,
such as a signal generator at the desired frequency, and then simply use
that transformation ratio to scope the primary tank circuit current.